矿物极化效应影响下MnO_(x)/TiO_(2)催化剂SCR活性  

Selective Catalytic Reduction Activity of MnO_(x)/TiO_(2) Catalyst Under Impact of Mineral Polarization

作　　者：赫连一哲 崔素萍[1] 马晓宇[1] 王亚丽[1] 徐海英 HELIAN Yizhe;CUI Suping;MA Xiaoyu;WANG Yali;XU Haiying(Divison of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学材料与制造学部,北京100124

出　　处：《硅酸盐学报》2023年第1期194-203,共10页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51621003)。

摘　　要：MnO_(x)/TiO_(2)催化剂的低温脱硝活性和稳定性是目前具有挑战性的研究方向。采用矿物极化效应对MnO_(x)/TiO_(2)催化剂进行了改性研究。适当细度的电气石对催化材料的脱硝性能有明显的改善,在较宽的温度范围内脱硝效率保持在90%以上,并延长了较高脱硝效率的持续时间。原位漫反射红外光谱分析结果表明,改性前后的催化剂遵循Langmuir-Hinshelwood机理,电气石极化可以加快反应气体的吸附速率,生成易于参与到后续反应的中间产物,从而提高脱硝性能。The low denitration activity and stability of MnO_(x)/TiO_(2)catalyst are still challenging. In this work, a MnO_(x)/TiO_(2)catalyst was modified via a polarization effect with tourmaline. Tourmaline with a proper fineness can improve the denitration performance of the catalytic material, obtaining the greater denitration rate above 90% in a wide temperature range and the prolonged high-efficiency denitration time. Based on the results of in-situ Fourier transform infrared spectroscopy, the reaction mechanism of the catalysts before and after modification with tourmaline follows the Langmuir-Hinshelwood mechanism, and tourmaline polarization can accelerate the adsorption rate of reaction gas and generate intermediate products liable for subsequent reaction, thus improving the denitration performance.

关 键 词：催化剂 矿物极化效应 原位漫反射红外光谱 Langmuir-Hinshelwood机理 

分 类 号：TQ172.9[化学工程—水泥工业]